EP 2045607 A3 20150520 - Automatic analyzer
Title (en)
Automatic analyzer
Title (de)
Automatisches Analysegerät
Title (fr)
Analyseur automatique
Publication
Application
Priority
JP 2007224993 A 20070831
Abstract (en)
[origin: EP2045607A2] If an expected amount of sample liquid cannot be suctioned because of incorrect liquid surface detection, correct measurement results may not be obtained. The motor driving a syringe reversely rotates for backlash correction and then stops. The movement of the sample cannot respond to the sudden operation of the syringe at that time because of the viscosity of sample liquid inside the pipe, thus showing large overshoot and undershoot of the pressure value. When air bubbles are present inside the pipe, the pressure inside the pipe during the backlash fluctuates differently from that during normal suction because of the cushioning effects of the air bubbles. In the present invention, pressure fluctuations are sampled at fixed time intervals and subjected to arithmetic processing, using as a trigger the event (or a sign temporally close to that event) of the reverse motor rotation for the backlash correction, thereby discriminating normal suction from suction of sample liquid with undesirable air bubbles.
IPC 8 full level
G01N 35/00 (2006.01); G01N 35/10 (2006.01)
CPC (source: EP US)
G01N 35/00613 (2013.01 - EP US); G01N 35/1016 (2013.01 - EP US); G01N 2035/1025 (2013.01 - EP US)
Citation (search report)
- [X] US 5723795 A 19980303 - MERRIAM RICHARD [US]
- [X] JP 2003254982 A 20030910 - HITACHI HIGH TECH CORP
- [X] US 5488854 A 19960206 - KAWANABE JUNICHI [JP], et al
- [X] US 6370942 B1 20020416 - DUNFEE WILLIAM DAVID [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2045607 A2 20090408; EP 2045607 A3 20150520; EP 2045607 B1 20200729; CN 101377521 A 20090304; CN 101377521 B 20130116; JP 2009058318 A 20090319; JP 4491477 B2 20100630; US 2009074614 A1 20090319; US 2011267198 A1 20111103; US 8231843 B2 20120731
DOCDB simple family (application)
EP 08015072 A 20080826; CN 200810214474 A 20080828; JP 2007224993 A 20070831; US 20042708 A 20080828; US 201113180084 A 20110711